Hecht, Eugene. <br/><br/>
Introduction to anthropology 
Roger Pearson 
 - New York  McGraw-Hill  c1976 
 - 242 p.  ill.  28 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>9780070277304 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optics--Problems, exercises, etc.<br/>Optics.